Solution of cellulose derivatives



Patented Nov. 4, 1930 GERMANY ANGELO KNORR, or BERLIN, GERMANY, nssreivon ro r. epnnniannmnusmitin A rg- TIENGESELLSGHAFT, F FRANKFORT-ON-THE-MAIN, GER-MANY, A coRroR A'rIo v on SOLUTION on CELLULOSE DERIVATIVES No Drawing. Application filed March 16, 1928, Serial No. 262,329, and in' Germany De'ceinbrfZB, 19 24. 7

ture of cellulose'lacquers. It possesses not only excellent solvent properties for nitrocellulose, water-insoluble cellulose ethers and such acetyl celluloses as are soluble in acetone, but it is capable of dissolving all the compounds usually employed in the manufac ture of cellulose lacquers. For instance it is a good solvent for natural and artificial resins, for many dyestuffs and for the compounds known in the manufacture of cellulose lacquers as gelatinizing and softening agents.

The solutions of the cellulose derlvatives in dioxane can be diluted with hydrocarbons, for instance with hydrocarbons of the benzene series, with aliphatic alcohols, especial ly with ethyl alcohol, glycol-ethers, ketones and other diluents without the solutions be ing upset. When dissolving such nitrocelluloses as possess a high viscosity in the solved state, it is advantageous to add to the dioxane a small amount of an aliphatic alcohol.

The following examples serve to illustrate the invention without limiting it, the parts being by weight:

Example 1.10 parts of collodion cotton are dissolved in a mixture of 110' parts of dioxane, parts of butyl acetate and 55 parts of toluene. When used as a lacquer the solution yields highly brilliant clear coatings;

E wample 2.-10 parts of'a nitrocellulose, solutions of which have a low viscosity, are dissolved in a mixture of 15 parts by volume of dioxane, 15 parts by volume of anhydrous ethanol, parts by volume of benzene, parts by volume of ethylene-glycol-monoethyl ether and 5 parts by volume of butanol. This lacquer yields clear brilliant coatings.

To the solution softening agents, such as tricresylphosphate or dibutylphthalate, and

pliant coatings which dyestuffs, for example rhodamine B maybe added. .7

Ewample'3.100-parts ofcollodion cotton, 7

100 .parts of the resin. obtainedirom cyclojv' hexanone by condensation andi partsv fofa partly: oxydized linseed oil,-wliichmay; contain 1.5-2 per cent. of cobalt'linoleataare dissolved in a mixture of 100. parts of. ethanol,

135parts of dioxane, 200 partsof methylcy clohexanone and 150parts' ofxylene. The lacquer gives good smoothcoatings;

Ewample 45-50 partsof ethyl cellulose I dissolved in a: mixture of parts of dioxane,- I

20:parts of benzene and-20 parts of butanol.

This lacquer.

gives diflicultly f inflammable coatings.

Example ,of cellulose acetate laurate and 8 parts ofdimethylphthalateare dissolved in '50 parts of a mixture. prepared from 10 parts by volume ofethanol, 10 parts by volume of benzene, 25 parts by volume. of

dioxane and 5 parts by volume of methylgly z col-acetate. The lacquer yields clear'sbrilare 1 water repelling and water-proof. v f i 9 E wample .6.'*1 part ofcellulose-dilaurate is dissolvedin lO parts of a mixture prepared from 6 parts by volume ofbenzene,,l'partby volume of chloroform and 3 parts :by volume of dioxane. The lacquer furnishes a clear elastic coating; WhatI claim is: i m r 1. -A cellulose lacquer comprising a cellulose derivative, the hydrogen atom of at least one hydroxyl'group of which is substituted by alkyl or acyl,,and dioxane. 2. 'A cellulose lacquer comprising a cellulose derivative, the hydrogen atom of at least one hydroxyl group of which is substihydrocarbon.

3. A cellulose lacquer comprising a cellulose derivative, the hydrogen atom of at least one hydroxyl group of which is substituted by alkyl or acyl, dioxane and a liquid hydrocarbon of the benzene series.

4:. A cellulose lacquer comprising a cellulose derivative, the hydrogen atom of at least one hydroxyl group of which is substi- I tuted by alkyl or acyl 'dioxane a liquid hy- 'drocarbon and an-aliphatic alco hol;

. 5. A cellulose lacquer comprising a cellulose derivative, the hydrogen atom of at least one hydroxyllgroup of which is substituted by alkylo acy l; ioxane; a vsofteni'ng zagg' en't anda liquidhydrocarbon, M f 6. A-celluloselacquer comprising a cellulose derivative, the hydrogen atom ofatleast by alkyl or acyl; dioxane; a softening agent, v

' ill liquid hydrocarbon and analiphatio aloo e .s

0L a V v v s 4 V a 7.: A cellulose'lacquer loseester dioxane and a liquid hydrocarbon.

I analiphaticalcohol;:i V ,7

V 11'; 'Aicellulose lacquer comprising-a cellu- "'1; H

lose'ester dioxane,a';softening agent and a aliquidhydrocarbon. 15. As atnew composition tionoffnitrocellulose containin'g'dioxane and A- cellulose lacquer comprising a cellulose ester," dioxane and auliquid hydrocarbon of the benzenetseriesi o l- 1 i 10."'A cellu1oseilacquercomprisingacellu- 1 iquid'hydrocarbon and v lose -e'ster,'-dioxane; a

liquid hydrocarbon;

a 12. Acelluloselacquer;comprisingazcellug loseesteiydioxane; a softening agent, fa'liq- 1 s *uidhydrocarbon andpan aliphatic alcohol.

13.1As anewfcomposition of matteiia solution of nitrocellulose containing dioxane;

V '14. i As a newcomposition of matter a solution ofnitrocellulose containingdioxane and aliquidehydrocarbon of the -benzene series, ;:16.- As a newhcomposition of matter a'solution ofvnitrocellulose;containingclioxane, a i

liquid hydrocarbon and an aliphaticalcohol. V

' 17. Asanew composition of matterasolution ofnitrocellul'ose containing dioxane, J a I softening agent and aliqu'id hydrocarbon. 18;As aiqnewzcomposition ofmatter a solu-s 451 tionof nitrocellulose containing dioxane, a 1

softeningagent', a liquid hydrocarbon and an aliphatic alcohol.

comprising a cellu-v x lose ester and dioizan'e. I I

I '*'8,',A cel1u1ose lacquerlgcomprising a ce1lu-, I

of matter asolu- 

